Hot water boiler for hot water mat



FIG. 1 a front, top perspective view of a hot water boiler for hot water mat, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear, bottom perspective view thereof. 

CLAIM I claim, the ornamental design for a hot water boiler for hot water mat, as shown and described. 